From: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
To: buildroot@busybox.net
Subject: [Buildroot] [PATCH 4/5] libglib2: define __GCC_HAVE_SYNC_COMPARE_AND_SWAP_4
Date: Fri, 20 Jul 2012 23:39:12 +0200 [thread overview]
Message-ID: <20120720233912.4a6bb4ea@skate> (raw)
In-Reply-To: <1342646260-11203-5-git-send-email-s.neumann@raumfeld.com>
Le Wed, 18 Jul 2012 23:17:39 +0200,
Sven Neumann <s.neumann@raumfeld.com> a ?crit :
> On ARMv5 atomic operations are not actually available as inlines
> but libgcc does still provide them as functions. Trick glib into
> using the functions instead of using the mutex-based fallbacks.
>
> This should probably be platform-dependant. The inline functions
> are available for ARMv6 and above and probably for other platforms
> as well. Please advice on how to fix this properly.
>
> Without this change performance of atomic operations is horrible
> on ARMv5 systems.
>
> Signed-off-by: Sven Neumann <s.neumann@raumfeld.com>
But isn't the compiler supposed to define
__GCC_HAVE_SYNC_COMPARE_AND_SWAP_4 by itself?
Thomas
--
Thomas Petazzoni, Free Electrons
Kernel, drivers, real-time and embedded Linux
development, consulting, training and support.
http://free-electrons.com
next prev parent reply other threads:[~2012-07-20 21:39 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-07-18 21:17 [Buildroot] RFC: update libglib2 to 2.32.4 Sven Neumann
2012-07-18 21:17 ` [Buildroot] [PATCH 1/5] libglib2: bump to version 2.32.4 Sven Neumann
2012-07-18 21:17 ` [Buildroot] [PATCH 2/5] libglib2: fix linker flags Sven Neumann
2012-07-20 21:32 ` Thomas Petazzoni
2012-08-07 15:40 ` Sven Neumann
2012-07-18 21:17 ` [Buildroot] [PATCH 3/5] libglib2: fix alignment checks Sven Neumann
2012-07-20 21:38 ` Thomas Petazzoni
2012-07-18 21:17 ` [Buildroot] [PATCH 4/5] libglib2: define __GCC_HAVE_SYNC_COMPARE_AND_SWAP_4 Sven Neumann
2012-07-20 21:39 ` Thomas Petazzoni [this message]
2012-07-18 21:17 ` [Buildroot] [PATCH 5/5] libglib2: do not use xlocale Sven Neumann
2012-07-20 21:39 ` Thomas Petazzoni
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